deepseek.com

https://www.deepseek.com/

Data from Aug 31, 2026, 9:09 PM UTC 4h old

Overall #1,423 AI #7 Developer Tooling #70 · 1 measurement · since Aug 31, 2026

This URL redirects to https://www.deepseek.com/en.

Lighthouse follows the redirect, so the numbers below describe the destination page, not this one. Not yet confirmed as a move; it needs to lead to the same place on several consecutive runs first.

Stack

Built with Next.js

Hosted by Amazon S3

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-08-02 → 2026-08-29).

LCP 1.72 s good

INP 140 ms good

CLS 0 good

Lighthouse Scores

Performance

no change

Accessibility

no change

Best Practices

no change

SEO

no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 6.25 s.

781 ms
1.56 s
2.34 s
3.12 s
3.90 s
4.69 s
5.47 s
6.25 s

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

71.2% of pixels differ — the page changes substantially. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric	Current	Previous	Change	Best	Worst
LCP Largest Contentful Paint	5.29 s	—	—	5.29 s	5.29 s
CLS Cumulative Layout Shift	0	—	—	0	0
TBT Total Blocking Time	406 ms	—	—	406 ms	406 ms
FCP First Contentful Paint	1.51 s	—	—	1.51 s	1.51 s
Speed Index	2.62 s	—	—	2.62 s	2.62 s
TTFB Time to First Byte	608 ms	—	—	608 ms	608 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-08-02 → 2026-08-29).

Metric	p75	Rating	Distribution (good / needs work / poor)
LCP CWV	1.72 s	good	87.5% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run	140 ms	good	86.7% good
CLS CWV	0	good	99.1% good
FCP	1.70 s	good	77.1% good
TTFB	754 ms	good	77% good

Metric

p75

Rating

Distribution (good / needs work / poor)

LCP CWV

1.72 s

good

87.5% good

INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run

140 ms

good

86.7% good

CLS CWV

good

99.1% good

FCP

1.70 s

good

77.1% good

TTFB

754 ms

good

77% good

Lab LCP vs Field LCP

Lab 5.29 s

Field p75 1.72 s

The lab LCP is 3.09× the field p75 — real users likely have above-average hardware or network connectivity.

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	FCP	TTFB
2026-08-29	1.72 s	140 ms	1.70 s	754 ms
2026-08-22	1.74 s	143 ms	1.73 s	741 ms
2026-08-15	1.76 s	144 ms	1.75 s	721 ms
2026-08-08	1.78 s	145 ms	1.76 s	724 ms
2026-08-01	1.79 s	145 ms	1.78 s	730 ms
2026-07-25	1.82 s	146 ms	1.80 s	740 ms
2026-07-18	1.84 s	146 ms	1.80 s	758 ms
2026-07-11	1.87 s	146 ms	1.80 s	772 ms
2026-07-04	1.89 s	147 ms	1.79 s	781 ms
2026-06-27	1.90 s	148 ms	1.77 s	779 ms
2026-06-20	1.88 s	146 ms	1.75 s	765 ms
2026-06-13	1.87 s	147 ms	1.73 s	748 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-08-29

1.72 s

140 ms

1.70 s

754 ms

2026-08-22

1.74 s

143 ms

1.73 s

741 ms

2026-08-15

1.76 s

144 ms

1.75 s

721 ms

2026-08-08

1.78 s

145 ms

1.76 s

724 ms

2026-08-01

1.79 s

145 ms

1.78 s

730 ms

2026-07-25

1.82 s

146 ms

1.80 s

740 ms

2026-07-18

1.84 s

146 ms

1.80 s

758 ms

2026-07-11

1.87 s

146 ms

1.80 s

772 ms

2026-07-04

1.89 s

147 ms

1.79 s

781 ms

2026-06-27

1.90 s

148 ms

1.77 s

779 ms

2026-06-20

1.88 s

146 ms

1.75 s

765 ms

2026-06-13

1.87 s

147 ms

1.73 s

748 ms

Page weight

Metric	Current	Previous	Change	Best	Worst
Page Weight	739 kB	—	—	739 kB	739 kB
Requests	68	—	—	68	68
Third-party Weight	0 B	—	—	0 B	0 B
Third-party CPU	0 ms	—	—	0 ms	0 ms
Unused JS	279 kB	—	—	279 kB	279 kB
Unused CSS	0 B	—	—	0 B	0 B

By resource type

script font

script 64.8% 343 kB · 38 req
font 15.5% 82.1 kB · 5 req
document 7.7% 40.8 kB · 2 req
image 6.5% 34.6 kB · 4 req
stylesheet 3.4% 17.9 kB · 6 req
other 2% 10.7 kB · 12 req

Page health

Metric	Current	Previous	Change	Best	Worst
Main Thread Work	4.61 s	—	—	4.61 s	4.61 s
Long Tasks	7	—	—	7	7
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	8	—	—	8	8
A11y Failures	4	—	—	4	4
A11y Failing Nodes	6	—	—	6	6

Main thread work

other 1.59 s

style layout 1.19 s

script evaluation 1.03 s

paint composite render 465 ms

script parse compile 295 ms

parse HTML 27 ms

Axe violations axe-core 4.13.0, full rule set

8 violating nodes across 5 rules, 334 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

critical button-name — Buttons must have discernible text 2 nodes
serious link-name — Links must have discernible text 2 nodes
moderate region — All page content should be contained by landmarks 2 nodes
serious aria-prohibited-attr — Elements must only use permitted ARIA attributes 1 node
serious color-contrast — Elements must meet minimum color contrast ratio thresholds 1 node

Accessibility failures 4 of 24 audits

button-name — Buttons do not have an accessible name 2 nodes
link-name — Links do not have a discernible name 2 nodes
aria-prohibited-attr — Elements use prohibited ARIA attributes 1 node
color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took
Aug 31, 2026, 9:09 PM UTC	70	5.29 s	0	406 ms	739 kB	3/3	±18	2,350 -5%	36.3s

When

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Aug 31, 2026, 9:09 PM UTC

5.29 s

406 ms

739 kB

3/3

±18

2,350 -5%

36.3s